anecdotal evidence


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anecdotal evidence

Evidence based on the occurrence of single unique event (e.g., a case report of an unusual medical finding or response to a therapy).

Anecdotes are extremely weak support of a theory; even if the event itself has been verified, its occurrence may be inappropriately attributed to an unusual therapy, and other unrecognised factors (confounders) may have invalidated the initial prediction of demise. Multiple similar anecdotes do not significantly increase support and at best serve justify a scientific experiment to empirically test the theory.

anecdotal evidence

Evidence based on anecdotes arising from the analysis of individual clinical cases, rather than the study of scientifically randomized groups of patients. Such evidence may be true or false, but it is always unreliable because it is based on hearsay, faulty reasoning, or other cause.
See also: evidence
References in periodicals archive ?
A Bank of Ireland spokeswoman said anecdotal evidence suggested that British savers were moving cash to the bank to take advantage of the guarantee.
I urge all nurses who want to help their compatriots to take part, so we have hard evidence to back up our anecdotal evidence," Walker said.
Anecdotal evidence suggests that traditional treatment does not fully restore hearing.
There is overwhelming research and anecdotal evidence suggesting that traditional letter writing has significantly dwindled due to the increase use of email, online chats, telephone, and other electronic communication devices.
Quality commercial masks are not always accessible, but anecdotal evidence has showed that handmade masks of cotton gauze were protective in military barracks and in healthcare workers during the Manchurian epidemic (6, 7).
Robert Epstein ["Is Gay a Choice?" March 14] is misusing "science" to support ex-gay propaganda, just as Christians are misusing "intelligent design." Anecdotal evidence of "selfoproclaimed ex-gays" doesn't prove his claim that some gays can switch.
Anecdotal evidence from sports skills also indicates a tendency to undershoot targets.
But based on personal experience and anecdotal evidence, I believe that, while more students may be going back home, the absolute numbers are not large enough to be concerned about.
A Langbaurgh PPI spokeswoman said: "The Out of Hours service, the service you contact when you need to see a GP urgently between 6pm and 8am, is repeatedly raised at forum meetings and members are aware of anecdotal evidence that the service is failing patients.
There is anecdotal evidence that the use of these processes may vary from region to region and industry to industry.
To date, only anecdotal evidence of such an HIV cure have been found in sub-Saharan Africa and in two patients who shook off the virus in the 1980s.
Please e-mail any anecdotal evidence, issues and/or questions you have regarding this program to taxletter@aicpa.org, so your concerns may be addressed with government personnel at that conference.